Can You Put Metal Roof Over Shingles
Of course, you can install a metal roof over shingles in the simplest terms. However, you’ll want to check with your local building department before making any decisions. Building departments in some areas will only allow a re-roof over just one layer of shingles, while departments in other places may allow you to place the roof over two layers of shingles.
So, it’s possible, which is excellent news! But you might be wondering what the advantages and disadvantages are and what to keep in mind during installation. Keep reading to find out.
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Advantages Of Metal Roof Over Shingles
There are some advantages to choosing a metal roof, and there are even more when you decide to put a metal roof over shingles.
Advantages of metal roofs in general:
- Metal roofs have become a more popular option for homeowners due to their reputation for longevity and curb appeal.
- They can last much longer than shingles. Depending on the material, they can last for about 40-70 years.
- They can withstand almost any weather condition to keep your home safe, comfortable, and dry. Rain will quickly and efficiently drain, and snow will be able to melt and slide off easily.
- Many can also resist fire (whether a lightning strike or a wildfire) and withstand a hail storm.
- They can come in a wide variety of colors and finishes. These include the appearance of natural cedar shakes or stone.
- They can improve your home’s energy efficiency by reflecting solar radiant heat, reducing cooling costs by 10-25%.
Advantages of metal roofs if they are installed above the existing shingle layer:
- By placing metal roofing on top of existing shingles, you can save on the labor costs of ripping them off.
- Metal roofs over shingles will also provide extra coverage for your home, helping insulate it further.
Disadvantages of metal roofs:
- Metal roofs can be more expensive than other types of roofs. Even with their durability, which helps increase value and balance over the expense over time, many homeowners decide to get a cheaper roof.
Installation Of Metal Roofing Over Shingles
If you choose to install metal roofing on top of the existing shingles, there are certain things you must keep in mind. We will break them down, so you know what to look for. But first, here are a few precautions about the underlying material:
- Address any existing roof leaks and replace rotten rafters or sheeting.
- Look out for any signs of the previous roof weighing too much. Signs may include buckling tresses or sagging decking.
Cost
You’re probably wondering about the cost of this. While it’s cheaper to purchase shingle roofing(which is why most homes have them), metal roofing will provide you with better value in the long term. They look beautiful, but they’re also designed to last decades longer because of their durability. A metal roof built correctly will be able to handle almost any storm. You will never have to purchase another roof again in your life.
FREQUENTLY ASKED QUESTIONS
CAN YOU PUT A METAL ROOF OVER SHINGLES?
Of course, it’s possible. Before starting your project, you will need to check with your local building department to see if they’ll allow you. Some areas in Florida will only allow re-roofing over just one layer of shingles, while others will allow it over two.
DO I NEED UNDERLAYMENT FOR A METAL ROOF ABOVE THE EXISTING ROOF?
Yes. The shingles may be able to act as an underlayment for the roof. However, the shingles expanding and contracting can cause damage underneath the metal roof over time. For this reason, it’s usually recommended that you remove the old roof on your home before installing a metal roof.
